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Snubbers

Application

A snubber is an electrical apparatus that is highly effective in protecting medium-voltage transformers from electrical transients. It is a passive electrical device, cialis comprised of appropriately selected resistors and capacitors. While lightning arresters help protect the transformers from the high voltage transients that appear on the line after a lightning strike, order snubbers are more suited to the more common problem of transients that typically arise due to switching of circuit breakers in the system. Examples of the switching operation include instances where a circuit breaker switches between transformer primaries, or automatically triggered switching between grid and reserve power.

When a circuit breaker interrupts current flow, an arc develops across its contacts. The rapid current interruption usually occurs somewhere other than the current zero-crossing point, giving rise to a Transient Recovery Voltage (TRV), which has significant high-frequency content. If the transients are at the natural resonance frequency of the system, then there is a possibility of internal oscillatory voltages developing in the primary windings of the transformer. A high turn-to-turn voltage will result, which will lead to damage of the insulation.

The problem is further exasperated with modern vacuum-type circuit breakers, which have shorter distances between contacts. This serves to increase the speed of the interrupting cycle. The transient level and frequency are functions of the physical distance between the breaker and transformer, transformer construction, the type of load being switched, and the switching characteristic of the breaker.

The RC-snubber network lowers the frequency of the transient voltage applied to the transformer primary below the resonance frequency of the circuit. It reduces the development of the oscillatory voltages and provides a low impedance path to ground for the transients.

Snubbers are a low cost means for protecting a transformer against a costly repair and related downtime. In designing medium voltage power systems, it is a good practice to at least leave space for future installation of a snubber network.

Available sizes & Construction

Rex Power Magnetics can supply snubbers separately or as an option that is available for its power transformers. The Resister and Capacitor are also mated with a fuse for protection of these components.

Rex snubbers are available for primary voltage levels 480/600 up through to 46 kV. Specifically, designs are available for the following voltage levels:

  • 2400 V
  • 4160 V
  • 13.8 kV
  • 18 kV
  • 26 kV

Please contact our engineering department for details: This email address is being protected from spambots. You need JavaScript enabled to view it.


Canadian Sales Representatives

Canadian Sales Representatives

 

Read more: Canadian Sales Representatives


AC Line / Load Reactors

Today’s solution to SCR Drive/Inverter problems

Inductors placed at the input and output of electrical equipment can provide protection and improve performance. Line Reactors absorb many power line disturbances which could damage or shut down your inverters, order variable speed controllers, or other voltage-sensitive equipment.

 

Read more: AC Line / Load Reactors


Standard Isolation Transformers

Application

Rex Isolation Transformers are available for single phase and three phase applications. The following is applicable to both types, see and further information is available by selecting your application.

 

Read more: Standard Isolation Transformers


Drive Isolation Transformers

Overview of Drive Isolation Transformers

Today's modern electronic, electric components and circuitry such as computers, copiers, printers, fax machines and display terminals utilize switching mode power supplies for their operation. These switching mode power supplies are non-linear in nature and can cause significant power system problems:

  • Circuit breakers and fuses blowing far below current ratings
  • Neutrals in transformers and panel boards are much hotter than their ratings
  • Distributions Transformers are overheating even when operating well within their specified nameplate rating

Read more: Drive Isolation Transformers


Autotransformers

Application

autotransformersDesigned for installation in industrial and commercial buildings where a reliable power source is required for lighting and other low voltage equipment and machinery. Indoor and outdoor installation is possible depending on the enclosure.

 

Read more: Autotransformers


Control Transformers

Application

Industrial control transformers are used to convert the available supply voltage to the voltage that is required to supply industrial control circuits and motor control loads.
These loads consist of a combination of electromagnetic devices such as solenoid operated valves, dosage switches, here bells, alarms, and other components such as indicator lights, timers, electronic equipment, and logic boards.

 

Read more: Control Transformers


Harmonic Mitigating Transformers

REX Power Magnetics manufactures and markets a full line of harmonic power mitigating products in cooperation with Power Quality International Inc. (PQI Inc.).

Read more: Harmonic Mitigating Transformers


Epoxy Encapsulated (Potted) Transformers

Application

Slide1

  • Standard Dry Type Ventilated Transformers are cooled by natural circulation of the surrounding air through its windings. For trouble free operation and long life expectancy, health the ventilating air must be reasonable free from dust, cialis moisture or other damaging corrosive fumes. For this reason, sildenafil standard Dry Type ventilated transformers are normally installed in suitable, indoor locations where they are protected from damaging elements.
  • Some specifications require installation of transformers in hazardous surroundings where the above condition can be met.
  • Epoxy Potted Transformers (also referred to as Epoxy Resin Encapsulated) are designed for such conditions.
  • Typical areas of use include: Corrosive environments - Petro-Chemical, steel, pulp and paper industries; Damp conditions - Mines, pump-houses, underground or rooftop service areas; Airborne dust, conductive particles

Read more: Epoxy Encapsulated (Potted) Transformers


Custom transformers for unique applications

reactors air core3Besides our custom transformer offerings, store Rex Power Magnetics is also structured and prepared to work with our customers on very unique and specialized projects. Our engineering department’s focus on continual research and product development means we have the resources to offer unique and practical solutions to a wide variety of needs, cost in industries ranging from aerospace to medical test equipment.

 

Read more: Custom transformers for unique applications


Three Phase – Standard Isolation Transformers

Application

autotransformersDesigned for installation in industrial and commercial buildings where a reliable power source is required for lighting and other low voltage equipment and machinery. Indoor and outdoor installation is possible depending on the enclosure.

 

Read more: Three Phase – Standard Isolation Transformers


High Power Transformers

Application

Rex dry type power transformers are primarily designed for stepping down high voltages from transmission and distribution systems to utilize voltages in commercial and industrial, institutional or utility applications. They are ideally suited for both indoor and outdoor applications.

Dry type power transformers require minimal maintenance to provide many years of reliable trouble free service. Unlike liquid filled transformers which are cooled with oil or a fire resistant liquid dielectric, dry type units utilize only environmentally safe, CSA and UL recognized high temperature insulation systems. Every dry type design provides a safe and reliable power source which does not require fire proof vaults, catch basins or the venting of toxic gasses. These important safety factors allow the installation of dry type transformers inside buildings close to the load, which improves overall system regulation and reduces costly secondary line losses.

Rex Power Magnetics provides quality dry type power transformers up to 15 MVA at 34.5 kV and 150 kV BIL. A sampling of their applications are:

  • Power Distribution
  • Indoor or Outdoor Primary and Secondary Unit Substations
  • Grounding Transformers
  • Mining, Pulp and Paper Application
  • Corrosion Resistant Transformers for Marine Distribution and Power
  • Low Electromagnetic Field Emission Transformers For Hospital and Institutional Use
  • Traction Power Rectifier Transformers for Transit Systems
  • Motor Starting & Drive System Applications
  • High Harmonic and Intermittent Load Applications
  • Many Other Applications

Features

  • Using Computer Aided Design (CAD) techniques and modern materials, Rex engineers have created a range of highly efficient transformers having long trouble-free life with reduced weight, size, and cost.
  • Ventilation openings in the enclosure are coordinated with the cooling ducts in the coils to ensure proper natural circulation of the cooling air for long life and minimum losses.
  • General-purpose ventilated steel enclosure, suitable for indoor locations. After fabrication, they are finished in ASA 61 grey powder coating, suitable for most industrial and commercial installations.
  • CSA certified, File No. LR34493.
  • UL listed, File No. E108255.
  • Transformers up to 75 kVA capacity may be readily hung on H-columns, walls , shelves or floor mounted to suit each installation. All units have lifting lugs, conduit KOs and a removable front cover for convenient access to terminals.
  • Transformers rated 112.5–300 kVA capacity are suitable for floor or platform mounting and complete with integral lifting lugs, a removable top, as well as front and rear panels for convenient access to the terminals.
  • Class 220 insulation used throughout range
  • Transformer terminations rated below 330 Amps are supplied with suitable hardware and lugs for cable connection. Terminations above 330 Amps are supplied with terminal pads only.
    Typical Configurations

Insulation

The lifespan of the insulation is the main determinant in the life of the transformer. The working temperature of the transformer affects the life of the insulation. This temperature is a combination of the unit's temperature rise, the ambient temperature and the hot spot temperature.

Rex Power Magnetics Transformers are manufactured with class 220OC Insulation materials. Only high temperature resistant materials of the best quality are used including Nomex Aramid papers, Silicone or Polyester Coated Fiberglass, Nomex Sleeving, Glass Tapes and Polyester/Glass Duct Sticks.

Core Construction

Every Rex Power Transformer core is constructed from electrical grade, cold rolled grain oriented silicone steel of M5 grade or better. Grain oriented steel is utilized for its superior magnetic permeability, low hysteresis and eddy current losses. Steel is cut into individual laminations on automated cutting machines to ensure precision and consistency.

Core laminations are meticulously stacked on specially designed jig tables. The individual laminations of the core are then clamped together by structural grade steel core clamps. Once the core is complete, an epoxy coating is applied to guard against corrosion.

At Rex Power Magnetics, we construct our transformer cores with either rectangular or cruciform configuration. The core configuration is chosen to provide the most efficient unit with the best weight and dimension factors. Both configurations may utilize either the Butt & Lap stacking method or the Full Miter cut stacking method.

Standard Factory Testing

Every power transformer by Rex Power Magnetics receives the following standard production tests.

    • Resistance Measurement
    • Ratio test
    • Polarity and Phase Relation test
    • No-Load Loss and Excitation Current test
    • ULoad Loss Test
    • Impedance Test
    • Applied Potential Test
    • Induced Potential Test

Other Tests available as options:

  • Basic Impulse Insulation Level (BIL)
  • Temperature Rise Test
  • Partial Discharge Test (Corona)
  • Sound Level Test
  • RIV test
  • EMT test
  • Power Factor test

Optional Accessories

  • Provision for Future Fans or Fan Packages (ANF) completely installed with or without Control Power
  • Buss Co-ordination with primary and secondary switchgear
  • Dial (Analog) or Digital Thermometers to monitor winding temperatures
  • Neutral Ground Resistors (NGR)
  • Strip Heaters to avoid condensation when the transformer is not energized
  • Ground Fault Relays (GFR)
  • Anti-Vibration mounting to reduce transformer hum (sound level)
  • Provision for Seismic mounting or complete Seismic Snubbers and Restraints
  • Lighting Arrestors (LA) available in Distribution, Intermediate or Station Class
  • Provision for Buss Duct Entry
  • Fully Insulated Buss
  • Mimic Buss
  • Kirk-Key Interlock Systems

Typical Drawings of Medium Voltage High Power Transformersin Nema-1 Enclosure

Drawings of 150°C or 115°C Rise, Stubs Up, Max. 600V/10kV BIL on L.V.
BIL 10kV 30kV 45kV 60kV 95kV 125kV 150kV
Rating 1,200V 5,000V 8,700V 15,000V 18,000V 25,000V 34,500V
225kVA 225KVA-BIL10 225KVA-BIL30 225KVA-BIL45 225KVA-BIL60 225KVA-BIL95 Consult Eng. Consult Eng.
300kVA 300KVA-BIL10 300KVA-BIL30 300KVA-BIL45 300KVA-BIL60 300KVA-BIL95 Consult Eng. Consult Eng.
450kVA 450KVA-BIL10 450KVA-BIL30 450KVA-BIL45 450KVA-BIL60 450KVA-BIL95 450KVA-BIL125 450KVA-BIL150
500kVA 500KVA-BIL10 500KVA-BIL30 500KVA-BIL45 500KVA-BIL60 500KVA-BIL95 500KVA-BIL125 500KVA-BIL150
600kVA 600KVA-BIL10 600KVA-BIL30 600KVA-BIL45 600KVA-BIL60 600KVA-BIL95 600KVA-BIL125 600KVA-BIL150
750kVA 750KVA-BIL10 750KVA-BIL30 750KVA-BIL45 750KVA-BIL60 750KVA-BIL95 750KVA-BIL125 750KVA-BIL150
1000kVA 1000KVA-BIL10 1000KVA-BIL30 1000KVA-BIL45 1000KVA-BIL60 1000KVA-BIL95 1000KVA-BIL125 1000KVA-BIL150
1250kVA 1250KVA-BIL10 1250KVA-BIL30 1250KVA-BIL45 1250KVA-BIL60 1250KVA-BIL95 1250KVA-BIL125 1250KVA-BIL150
1500kVA 1500KVA-BIL10 1500KVA-BIL30 1500KVA-BIL45 1500KVA-BIL60 1500KVA-BIL95 1500KVA-BIL125 1500KVA-BIL150
1750kVA 1750KVA-BIL10 1750KVA-BIL30 1750KVA-BIL45 1750KVA-BIL60 1750KVA-BIL95 1750KVA-BIL125 1750KVA-BIL150
2000kVA 2000KVA-BIL10 2000KVA-BIL30 2000KVA-BIL45 2000KVA-BIL60 2000KVA-BIL95 2000KVA-BIL125 2000KVA-BIL150
2250kVA 2250KVA-BIL10 2250KVA-BIL30 2250KVA-BIL45 2250KVA-BIL60 2250KVA-BIL95 2250KVA-BIL125 2250KVA-BIL150
2500kVA 2500KVA-BIL10 2500KVA-BIL30 2500KVA-BIL45 2500KVA-BIL60 2500KVA-BIL95 2500KVA-BIL125 2500KVA-BIL150
3000kVA 3000KVA-BIL10 3000KVA-BIL30 3000KVA-BIL45 3000KVA-BIL60 3000KVA-BIL95 3000KVA-BIL125 3000KVA-BIL150
3500kVA Consult Eng. 3500KVA-BIL30 3500KVA-BIL45 3500KVA-BIL60 3500KVA-BIL95 3500KVA-BIL125 3500KVA-BIL150
3750kVA Consult Eng. 3750KVA-BIL30 3750KVA-BIL45 3750KVA-BIL60 3750KVA-BIL95 3750KVA-BIL125 3750KVA-BIL150
4000kVA Consult Eng. 4000KVA-BIL30 4000KVA-BIL45 4000KVA-BIL60 4000KVA-BIL95 4000KVA-BIL125 4000KVA-BIL150
4500kVA Consult Eng. 4500KVA-BIL30 4500KVA-BIL45 4500KVA-BIL60 4500KVA-BIL95 4500KVA-BIL125 4500KVA-BIL150
4750kVA Consult Eng. 4750KVA-BIL30 4750KVA-BIL45 4750KVA-BIL60 4750KVA-BIL95 4750KVA-BIL125 4750KVA-BIL150
5000kVA Consult Eng. 5000KVA-BIL30 5000KVA-BIL45 5000KVA-BIL60 5000KVA-BIL95 5000KVA-BIL125 5000KVA-BIL150

Typical Drawings of Medium Voltage High Power Transformersin Nema-3R Enclosure

Drawings of 150°C or 115°C Rise, Stubs Up, Max. 600V/10kV BIL on L.V.
BIL 10kV 30kV 45kV 60kV 95kV 125kV 150kV
Rating 1,200V 5,000V 8,700V 1,5000V 18,000V 25,000V 34,500V
225kVA 225KVA-BIL10-3R 225KVA-BIL30-3R 225KVA-BIL45-3R 225KVA-BIL60-3R 225KVA-BIL95-3R Consult Eng. Consult Eng.
300kVA 300KVA-BIL10-3R 300KVA-BIL30-3R 300KVA-BIL45-3R 300KVA-BIL60-3R 300KVA-BIL95-3R Consult Eng. Consult Eng.
450kVA 450KVA-BIL10-3R 450KVA-BIL30-3R 450KVA-BIL45-3R 450KVA-BIL60-3R 450KVA-BIL95-3R 450KVA-BIL125-3R Consult Eng.
500kVA 500KVA-BIL10-3R 500KVA-BIL30-3R 500KVA-BIL45-3R 500KVA-BIL60-3R 500KVA-BIL95-3R 500KVA-BIL125-3R 500KVA-BIL150-3R
600kVA 600KVA-BIL10-3R 600KVA-BIL30-3R 600KVA-BIL45-3R 600KVA-BIL60-3R 600KVA-BIL95-3R 600KVA-BIL125-3R 600KVA-BIL150-3R
750kVA 750KVA-BIL10-3R 750KVA-BIL30-3R 750KVA-BIL45-3R 750KVA-BIL60-3R 750KVA-BIL95-3R 750KVA-BIL125-3R 750KVA-BIL150-3R
1000kVA 1000KVA-BIL10-3R 1000KVA-BIL30-3R 1000KVA-BIL45-3R 1000KVA-BIL60-3R 1000KVA-BIL95-3R 1000KVA-BIL125-3R 1000KVA-BIL150-3R
1250kVA 1250KVA-BIL10-3R 1250KVA-BIL30-3R 1250KVA-BIL45-3R 1250KVA-BIL60-3R 1250KVA-BIL95-3R 1250KVA-BIL125-3R 1250KVA-BIL150-3R
1500kVA 1500KVA-BIL10-3R 1500KVA-BIL30-3R 1500KVA-BIL45-3R 1500KVA-BIL60-3R 1500KVA-BIL95-3R 1500KVA-BIL125-3R 1500KVA-BIL150-3R
1750kVA 1750KVA-BIL10-3R 1750KVA-BIL30-3R 1750KVA-BIL45-3R 1750KVA-BIL60-3R 1750KVA-BIL95-3R 1750KVA-BIL125-3R 1750KVA-BIL150-3R
2000kVA 2000KVA-BIL10-3R 2000KVA-BIL30-3R 2000KVA-BIL45-3R 2000KVA-BIL60-3R 2000KVA-BIL95-3R 2000KVA-BIL125-3R 2000KVA-BIL150-3R
2250kVA 2250KVA-BIL10-3R 2250KVA-BIL30-3R 2250KVA-BIL45-3R 2250KVA-BIL60-3R 2250KVA-BIL95-3R 2250KVA-BIL125-3R 2250KVA-BIL150-3R
2500kVA 2500KVA-BIL10-3R 200KVA-BIL30-3R 2500KVA-BIL45-3R 2500KVA-BIL60-3R 2500KVA-BIL95-3R 2500KVA-BIL125-3R 2500KVA-BIL150-3R
3000kVA 3000KVA-BIL10-3R 3000KVA-BIL30-3R 3000KVA-BIL45-3R 3000KVA-BIL60-3R 3000KVA-BIL95-3R 3000KVA-BIL125-3R 3000KVA-BIL150-3R
3500kVA Consult Eng. 3500KVA-BIL30-3R 3500KVA-BIL45-3R 3500KVA-BIL60-3R 3500KVA-BIL95-3R 3500KVA-BIL125-3R 3500KVA-BIL150-3R
3750kVA Consult Eng. 3750KVA-BIL30-3R 3750KVA-BIL45-3R 3750KVA-BIL60-3R 3750KVA-BIL95-3R 3750KVA-BIL125-3R 3750KVA-BIL150-3R
4000kVA Consult Eng. 4000KVA-BIL30-3R 4000KVA-BIL45-3R 4000KVA-BIL60-3R 4000KVA-BIL95-3R 4000KVA-BIL125-3R 4000KVA-BIL150-3R
4500v Consult Eng. 4500KVA-BIL30-3R 4500KVA-BIL45-3R 4500KVA-BIL60-3R 4500KVA-BIL95-3R 4500KVA-BIL125-3R 4500KVA-BIL150-3R
4750kVA Consult Eng. 4750KVA-BIL30-3R 4750KVA-BIL45-3R 4750KVA-BIL60-3R 4750KVA-BIL95-3R 4750KVA-BIL125-3R 4750KVA-BIL150-3R
5000kVA Consult Eng. 5000KVA-BIL30-3R 5000KVA-BIL45-3R 5000KVA-BIL60-3R 5000KVA-BIL95-3R 5000KVA-BIL125-3R 5000KVA-BIL150-3R

Rex Power Magnetics Technical Capability

We have the engineering capability to design, manufacture and test all standard and specialty dry type transformers, related magnetic products, and power transformers rated up to 15,000KVA and 150kv BIL. All Rex Power Magnetic Products are CSA certified and most are UL listed including Dry Type Power Transformers.


Cast Coil Transformers

Features

castcoil1

Suitable For Harsh Environments - Rex Power Magnetics' Cast Coil Type Transformers offer the greatest degree of protection against the presence of atmospheric pollutants effecting the performance and life expectancy of the transformer.

High Short Circuit Strength - The fiberglass reinforced solid cast construction provides superior mechanical strength with the highest short circuit withstand capability of all types of transformers.

Read more: Cast Coil Transformers


Motor Guarding Transient Filters

 The Problem

LineFilters catThe steep voltage wave fronts of the Pulse Width Modulated (PWM) output of Adjustable Frequency Drives (AFD’s) produce high frequency effects which may damage the insulation of motors operated by the equipment. The problems result from two distinct effects.

 

Read more: Motor Guarding Transient Filters


Air Core Reactors. Custom Chokes

Air Core Reactors. Custom Chokes

reactors air core3

Cast Epoxy & Resin Impregnated
(up to 35, viagra order 000V 150kv BIL)

Application
•    Shunt Reactors to compensate for capacitive VARS
•    Current limiting Reactors
•    Filtering Reactors
•    Neutral Grounding Reactors
Air core reactors are designed utilizing specifically developed Finite Element Analysis software.

 

Read more: Air Core Reactors. Custom Chokes


Mini Power Centres

Application

Power-centerRex Power Magnetics Mini Power Centres combine three individual components into one NEMA Type 3R enclosure: a pre-wired primary and secondary main breaker, unhealthy an encapsulated single-phase (Type EP) or three-phase dry-type transformer or dry-type shielded transformer, and a secondary distribution load center with main breaker. Inter-connecting wiring is completed at the factory. Mini Power Centers are used wherever there is a 480V or 600V distribution system and loads requiring 208Y/120V, three-phase or 120/240V single-phase.

  Rating Single phase up to 30 kVA,
Three phase up to 45 kVA
Primary Voltage: 600V
Secondary Voltage: 120/240V for single phase
208Y120V for three phases
Insulation Class: 200°C
Winding Temperature Rise: 130°C (80°C, 115°C rise are optional)
Winding Conductor:  Copper

Standard Construction Consists of

minipowercentre
  • An encapsulated core & coil transformer
  • A circuit panel with 24, 30 or 42 branches wired to a secondary of a transformer
  • Primary circuit breaker installed/wired from the factory
  • Secondary main breaker installed/wired from the factory
  • CSA Enclosure Type 3R or NEMA 3R
  • Hinged circuit panel (can be padlocked)

Construction

  • Indoor/Outdoor application
  • Wall mounting
  • ASA 61 grey color
  • Wall mounting
  • Knock outs are provided for easy access
  • All live parts are enclosed

Meets applicable standards

product minipowercenter clip image002

  • CSA Certified
  • UL Listed
  • Manufactured and assembled in ISO 9001 certified facilities

Packaging

  • Secured to wooden skid
  • Wrapped for shipment

Minimum Order Specifications

  • Single or 3 phase,
  • kVA,
  • Frequency,
  • Primary Voltage,
  • Secondary Voltage,
  • BIL,
  • Insulation Class,
  • Temp Rise,
  • Number of Circuit Breakers.

Optional

  • Frequency
  • Shielding
  • Color

Repairs and Refurbishment

Today’s solution to Repairs and Refurbishment to be design

Under construction.


Read more: Repairs and Refurbishment


Enclosures and Elecrical Accessories

Enclosure Nema Type 1

nema 1Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts and to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt).

Enclosure dimensions (inch.) and weights (lbs.)

Enclosure Size Width
Depth Height Weight Type Mounting Drawing
#0 9.50 7.00 8.00 10.5 Nema-1 Floor nema-1 0
#1 (13.5) 12.00  9.125 9.31 11 Nema-1 Floor nema-1 1-3

#2 (15.0) 11.00 11.00 14.0 18 Nema-1 Floor/Wall
#3 (19.5) 15.50 11.00 14.0 22 Nema-1 Floor/Wall
#12 73.00 (53.5) 45.5 79.5 735 Nema-1 Floor nema-1 12

 

Enclosure Nema Type 2

nema 2Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing)

Enclosure Nema Type 3R

nema 3rnema 2Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain , look sleet, snow); and that will be undamaged by the external formation of ice on the enclosure.

Enclosure dimensions (inch.) and weights (lbs.)

Enclosure Size Width
Depth Height Weight Type Mounting Drawing
#4  (19.25) 15.75 (16.00) 13.625 21.00 39 Nema-3R Floor/Wall nema-3r 4-7
#5  (23.875) 20.50 (16.00) 13.625 21.0 45.5 Nema-3R Floor/Wall
#6  (23.875) 20.50 (20.75) 18.375 26.375 61.5 Nema-3R Floor/Wall
#7  (27.375) 24.50 (21.75) 19.25 31.50 80.0 Nema-3R Floor/Wall
#8  30.75 (29.75) 27.5 31.5 115 Nema-3R Floor nema-3r 8-12
#9  40.00 (38.0) 31.00 45.75 202 Nema-3R Floor
#10 46.00 (50.0) 40.00 64.25 310 Nema-3R Floor
#11 60.00 (55.0) 45.00 70.50 520 Nema-3R Floor

Enclosure Nema Type 4

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external formation of ice on the enclosure.

Enclosure Nema Type 12

Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

Surge Arresters

Arresters

  • Easy to install
  • Available in 3, 6, 9, 12 and 15 kV ratings. Other voltage ratings available by request
  • Gapless zinc oxide core provides excellent non-linear voltage characteristic
  • Higher current carrying capability at overvoltage than conventional silicon carbide arrestors
  • Technical performance conforms to IEC 60099-4 and IEEE 62.11
  • Same day pick up or shipping available (Greater Toronto Area)
Rex Part Number Rated Voltage, [kV]
RLA-YH5W-3/9 3
RLA-YH5W-6/18 6
RLA-YH5W-9/27 9
RLA-YH5W-12/36 12
RLA-YH5W-15/45 15

 

 

 

 

 

Moulded Insulator Posts

Isolation posts

  • Easy to install
  • Available in 600V, 5kV, 15kV, and 24kV ratings. Other voltage ratings available
  • Durable brass or steel insert material
  • Custom materials, configurations, and sizes available upon request
  • Same day pick up or shipping available (Greater Toronto Area)
Rex Part NumberNominal VoltageBILHeightDiameterHole Thread CentreOff centreInsert material
 High Voltage insulators
 RV6090   5 kV  60 kV 90 mm (3 1/2") 60 mm (2 3/8")  #3/8-16  #1/4-20  Steel
 RV60155
  15 kV
 95 kV 155 mm (6") 60 mm (2 3/8")  #3/8-16  #1/4-20  Steel
 RV70210
  24 kV
 150 kV 210 mm (8 1/4") 70 mm (2 3/4")  #3/8-16  #1/4-20  Steel
 Low Voltage insulators (600V class)
 RSM25
  600 V
 10 kV 25 mm (1") 30 mm (1 1/8")  #1/4-20

Not

Applicable

 Brass
 RSM40
  600 V
 10 kV 40 mm (1 1/2") 40 mm (1 1/2")  #3/8-16  Brass
 RSM51
  600 V
 10 kV 51 mm (2") 40 mm (1 1/2")  #3/8-16  Brass
 RSM76
  600 V
 10 kV 76 mm (3") 50 mm (2")  #3/8-16  Brass

 


Control Power Transformers

Application

control power transControl Power Transformers (CPT) are used to supply power to control circuit in electrical panels.

Rating

  • Single phase up to 3000 VA
  • 7.2 kV
  • 60 kV BIL
  • Insulation Class: 130°C, adiposity 155°C, recipe 185°C

Construction

Standard Construction: Open construction with encapsulated coil.
Optional on CSA Enclosure: Type 1, 2, 3R, 4, and 12

Certification Requirements

  • CSA All of the above, and on custom made specification
  • UL 7200 Volt max and not certified with Enclosure Type 4 and Type 12

Standards

  • CSA C22.2 #47 M90, 66-1988, and C9-02
  • UL ANSI C57.13.2

Packaging

  • Secured to wooden skid
  • Wrapped for shipment

Minimum Order Specifications

VA, Frequency, Primary voltage, Secondary voltage, BIL, Insulation class.

Options:

  • Frequency
  • Fusing
  • Losses
  • Shielding
  • Dimensions
  • Colour

Standard and Custom (low voltage) transformers

transformer Not all transformers are created equal. Rex transformers offer superior value in many respects, order including durability, ed ease of installation, overload withstand capability, and standard features. Owing largely to our vertically integrated and advanced manufacturing facility, Rex transformers are both affordable and made to last.

Read more: Standard and Custom (low voltage) transformers


High Power (Medium voltage) Transformers

powertransformer

Rex Power Magnetics offers a complete line of transformers with primary voltages up to 44 kV (200 kV B.I.L.) with VPI coils or cast coils. Our dedicated product team can ensure timely and reliable delivery, cure with the flexibility to coordinate with your application’s switchgear requirements, as well as scheduling requirements.

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Green Line High Efficiency Transformers

Green LineRecent advances in materials and design tools mean Rex Premium High Efficiency transformers will pay back rapidly for the investment. Use our free downloadable cost comparator tool to enter your own system parameters and calculate the payback period, link using data from Rex or any other manufacturer. canada flag

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K-Factor Rated Transformers

Overview of K-Factor Rated Transformers

Today's modern electronic, electric components and circuitry such as computers, copiers, printers, fax machines and display terminals utilize switching mode power supplies for their operation. These switching mode power supplies are non-linear in nature and can cause significant power system problems:

  • Circuit breakers and fuses blowing far below current ratings
  • Neutrals in transformers and panel boards are much hotter than their ratings
  • Distributions Transformers are overheating even when operating well within their specified nameplate rating

Read more: K-Factor Rated Transformers


USA Sales Representative

USA Sales Representatives

 

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International Reps

International Sales Representatives

 

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